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Finding the Fourth Proportional to 542.36, 748.53 and 393.47

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Solution

The fourth proportional to 542.36, 748.53 and 393.47 is: 543.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.36 : 748.53 = 393.47 : x
  2. Step 2: Convert to fraction form
    542.36/748.53 = 393.47/x
  3. Step 3: Cross multiply
    542.36x = 748.53 × 393.47
  4. Step 4: Simplify right side
    542.36x = 294,522.16
  5. Step 5: Solve for x
    x = 294,522.16/542.36
  6. Step 6: Final answer
    x = 543.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.